Frances Tiafoe 1st American man in U.S. Open semis since Roddick in 2006

Frances Tiafoe followed up the win over 22-time Grand Slam champion Rafael Nadal in the fourth round of the U.S. Open by beating No. 9 seed Andrey Rublev 7-6 (3), 7-6 (0), 6-4 in the quarterfinal